MinT - Best Known (173, 173+20, s)-Nets in Base 4

Best Known (173, 173+20, s)-Nets in Base 4

(173, 173+20, 838874)-Net over F₄ — Constructive and digital

Digital (173, 193, 838874)-net over F₄, using

(u,Â u+v)-construction [i] based on
1. digital (3, 13, 14)-net over F₄, using
  - net from sequence [i] based on digital (3, 13)-sequence over F₄, using
    - Niederreiterâ€“Xing sequence constructionÂ II/III [i] based on function field F/F₄ with g(F) = 3 and N(F) ≥ 14, using
      - an explicitly constructive algebraic function field [i]
2. digital (160, 180, 838860)-net over F₄, using
  - net defined by OOA [i] based on linear OOA(4¹⁸⁰, 838860, F₄, 20, 20) (dual of [(838860, 20), 16777020, 21]-NRT-code), using
    - OA 10-folding and stacking [i] based on linear OA(4¹⁸⁰, 8388600, F₄, 20) (dual of [8388600, 8388420, 21]-code), using
      - discarding factors / shortening the dual code based on linear OA(4¹⁸⁰, large, F₄, 20) (dual of [large, large−180, 21]-code), using
        the primitive narrow-sense BCH-code C(I) with length 16777215Â = 4¹²âˆ’1, defining interval IÂ =Â [1,20], and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 21 [i]

(173, 173+20, 6652442)-Net over F₄ — Digital

Digital (173, 193, 6652442)-net over F₄, using

embedding of OOA with Gilbertâ€“VarÅ¡amov bound [i] based on linear OA(4¹⁹³, 6652442, F₄, 20) (dual of [6652442, 6652249, 21]-code), using
- discarding factors / shortening the dual code based on linear OA(4¹⁹³, large, F₄, 20) (dual of [large, large−193, 21]-code), using
  - strength reduction [i] based on linear OA(4¹⁹³, large, F₄, 22) (dual of [large, large−193, 23]-code), using
    - the primitive expurgated narrow-sense BCH-code C(I) with length 16777215Â = 4¹²âˆ’1, defining interval IÂ =Â [0,21], and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 23 [i]

(173, 173+20, large)-Net in Base 4 — Upper bound on s

There is no (173, 193, large)-net in base 4, because

18 times m-reduction [i] would yield (173, 175, large)-net in base 4, but
- mutually orthogonal hypercube bound [i]